workflow for creating sculpted tileable Tiles in blender?
I checked also on blender forum. There is currently no simple workflow. Some workflows require offseting the mesh to sculpt over seams.

Seems there's a patch for the issue submitted in 2015, but seems it was not officially accepted yet.

https://blenderartists.org/forum/showthread.php?373956-Wrap-mode-for-Sculpt

If anyone has any idea on how to do that he is wellcome anyway^^.

Seriously thinking to try to write my own plugin, unluckily I'm totally new to Blender python API